| 摘要 |
<p>The plant (1) has a sensor buried in soil and comprising a buried tubular collector (3). An air inlet block (4) is connected to an end of the collector, where another end of the collector is connected to an air outlet block (5). Air circulation unit (7) circulates air inside the sensor between inlet and an outlet of the sensor. Helical air ducts formation unit (11) mounted inside the collector forms air ducts on internal walls of the collector. The collector has a heat insulation (20) on ascent portion (3-3) of its length buried in upstream of the block (5) and until to the block (5).</p> |
